NumberResearchThousands-blocks in 703-688
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 703-688 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 703 blocks
Most active assignees, all time — NPA 703
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 703-688-0XXX | 0000–0999 | Available | LORTON | VA | ||
| — | 703-688-1XXX | 1000–1999 | Available | LORTON | VA | ||
| 2011-05-16 | 703-688-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - VA | 079F | LORTON | VA |
| 2011-05-16 | 703-688-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - VA | 079F | LORTON | VA |
| 2011-06-08 | 703-688-4XXX | 4000–4999 | Assigned | YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA | 367E | LORTON | VA |
| — | 703-688-5XXX | 5000–5999 | Reserved | PAETEC ITEL, LLC | 829J | LORTON | VA |
| 2017-06-15 | 703-688-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | LORTON | VA |
| 2015-12-09 | 703-688-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - VA | 8825 | LORTON | VA |
| 2016-09-07 | 703-688-8XXX | 8000–8999 | Assigned | NUSO, LLC | 551G | LORTON | VA |
| 2020-10-21 | 703-688-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF VIRGINIA, LLC - VA | 275G | LORTON | VA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.